mafiacustomz

im getting a 87 camaro with a 2.8 S.F.I. and i have a 4.3 tbi that i want to put in it and i was wanting to know if i can use the wire harness from the sfi and make it work on my tbi.

Jeff91RS

iTrader: (1)

the 4.3 wont bolt up to the 2.8 mounts and the tbi wiring wont match up to the sfi. the 4.3 tbi would drop right into a 5.0 tbi car with no mods tho. trans wont bolt up either

mafiacustomz

so i will have to go to carb and get some v8 mounts will the 700r4 trans bolt to the cross member

BladeQuarter

If you still have the Wiring fropm the 4.3 just use that, That way you can still use the Fuil Injection, I am in the process of putting a rebuilt Astro 4.3 into my Camaro. I am gonna use the stock astro harness, as for the moter mounts it will ount like a V8. Use the tranny from a V8 camaro and you will be fine

mafiacustomz

well im putting a 4.3 out of a astro to im going to use the 700r4 out of it to becouse it has a shift kit you can see it at my clubs my space page http://www.myspace.com/mafiacustomz

BladeQuarter

Coolust grab the wiring out of the Astro and you will be cool, also grab the compy

mafiacustomz

the astro is long and gone

BladeQuarter

Do you remember what year the astro was, if you do, go to a junkyard and pick one up for it. That would be the easiest thing to do

mafiacustomz

i dont wont to do all that wiring im just going to go carb

CamaroManBlack

No offense, but why do you want the 4.3? For all of that work, why not just get the V8? Gas mileage wouldn't be all that different, and you'd have more power. If you want to stay with a V6, have you given any thought to a 4th gen 3.8? You'd still have to change the transmission, mounts, harness, and computer, but you should be able to leave the suspension alone. The 3.8 offers 200hp and 25-30 miles per gallon without having to baby the throttle (and that's in a heavier 4th gen).

The 4.3 is a much heavier engine than the 2.8. How are you going to address the weight issue with the front suspension? V8 springs?

Also, you might have to get your hands on a V8 radiator and hoses. Be prepared for that.

I don't know what the 4.3 exhaust manifolds look like, but I'm doubting that the 2.8 Y-pipe is going to work for you. Start asking around the forum to see what other people have used with a 4.3 swap.

BladeQuarter

Not sure aboutr Guy, but for me its easy

#1 I have the engine w/wiring sitting here doing nothing
#2 I don't want a V8
#3 I know what kinda power this particular moter will put out
#4 Yes Im gonna have to get some V8 parts, I don't care

mafiacustomz

well see not many people give the 4.3 v6 or any v6 the respect that they should have so i built my 4.3 up to make it a power house thin when i put it in a camaro body and put a blow thru turbo on it and start smoking v8s thin people will see maybe the v6 is a good motor to race cars with.

Atilla the Fun

I'm hoping someone will be glad to hear that I've done this. My customer brought in a Camaro with a dead 2.8, and brought me a 4.3, and aasked if I could do it. I started by calling summit for ADD-713123 adapters, because from the trans to the motor mount on the 4.3 is several inches less than on the V8. Having previously swapped several V8s into factory-V6 third gens, I did nothing to the V6 front springs. No need. I bolted up a v8 700R-4 to the 4.3, and installed the trans in the factory position. Now, the adapters are meant to go between the engine block itself and the motor mounts, but to keep the power steering, I found it easier to attach the adapters to the frame, then put the motor mounts between the adapters and the block. There was some drilling involved. Now, the s-10 accessory brackets won't let me close the hood, so I swap the whole front setup from a '90 Camaro RS 305. Including the V8 water pump. Be warned, it's tight to the crossmember. At this point I call the guy, he comes over, and asks if we can just cut a tube from V8 headers. Then his cell phone rings. 5 minutes later he comes over to me and asks me how much he owes me. He pays, and tells me he will take the car in a few hours. I never saw him or the car again.

7SEALS

no one here is trying to steer you in the wrong direction, they are trying to help. Dollar for dollar, a v8 is going to put out way more power than a 4.3. Of course you can build a 4.3 to beat v8s but you are just throwing away a lot of money for no reason. I owned a 4.3L s10 pickup 5 speed and it was a joke of a motor. I was getting murdered by 4 cylinders hondas. Do a v8 swap, you won't regret it at all.

ad356

this is true but why would you want to replace a weak 305 with an even much weaker 4.3?

Hiwinds

I will be doing this swap soon myself. I have a 87 305tpi 5 speed. And am going to put the motor and trans out of my Syclone in it because it is sooooooo much fun to beat the crap out of the high and mighty v8 with a lowly v6. And the reason I am pulling the motor out of the sy is because I am doing a bowtie v6 build. And as far as weak.... on a base tune I made 530 to the gound on 15psi in the sy. Sooooooo why not I have a spare motor anyway.


The replacement for displacement is measured in PSI.

Atilla the Fun

not below about 1500 rpm, it isn't.

Hiwinds

What does idle speed have to do with anything. LOL 2700rpm at 84mph


1500rpm in od is like 45mph thats school zone speed. BUT 3 gears down is 4000rpm and loss of traction on d/r's But hey what do I know I'm just one of those slow v6 drivers

wesilva

iTrader: (35)

To the original question, the easiest route might be purchasing the Painless Wiring Harness to adapt a 4.3 TBI into any vehicle.

http://www.painlessperformance.com/w...partsearch=4.3